This Sunday - formerly the Sunday in the Octave of the Sacred Heart - is the 3rd Sunday after Pentecost in the Extraordinary Form. The propers of this Mass are centered around the mercy of God and the devotion of the Good Shepherd - in many ways making this a lesser Good Shepherd Sunday. In the Gospel, Christ tells the parable of the shepherd who leaves the 99 sheep to seek the single lost sheep. The propers all focus in on the great mystery of the Divine Mercy which is highlighted by this parable.
Ant. Look toward me, and have pity on me, O Lord, for I am alone and afflicted. Put an end to my affliction and my suffering, and take away all my sins, O my God.
V. To You, I lift up my soul, O Lord. In You, O my God, I trust; let me not be put to shame.
V. Glory be...
Ant. They trust in You who cherish Your name, O Lord, for You forsake not those who seek You. Sing praise to the Lord enthroned in Sion, for He has not forgotten the cry of the afflicted.
Ant. I say to you: there is joy among the Angels of God over one sinner who repents.